643610162 has 8 divisors (see below), whose sum is σ = 1039677996. Its totient is φ = 297050832.

The previous prime is 643610147. The next prime is 643610167. The reversal of 643610162 is 261016346.

It is a happy number.

643610162 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 642571801 + 1038361 = 25349^2 + 1019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (643610167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12377093 + ... + 12377144.

Almost surely, 2^643610162 is an apocalyptic number.

643610162 is a deficient number, since it is larger than the sum of its proper divisors (396067834).

643610162 is a wasteful number, since it uses less digits than its factorization.

643610162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24754252.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 643610162 is about 25369.4730335496. The cubic root of 643610162 is about 863.3912258583.

The spelling of 643610162 in words is "six hundred forty-three million, six hundred ten thousand, one hundred sixty-two".